This is an ILWIS Triple Sensor OTB (Open ToolBox) for Ilwis v.386o version compiling date 16-Jan-2020. Please copy this ZIPfile (as ZIP) to the Ilwis\Extensions\ directory of Ilwis386. Then open ILWIS, wait a few seconds, and the Toolbox will be (unzipped automatically) and deployed in the Menu. Pls. read the manual for further instructions on use.